Based on the analysis of the remanufacturing process of oil drilling and production equipment, a remanufacturing cost evaluation method is proposed by quantitatively evaluating the cost expenditure of each remanufacturing step. This method focuses on the influence of process cost, energy consumption cost and environmental cost on remanufacturing of equipment parts. And a strategy to evaluate remanufactureability directly from the cost consumption is obtained. As the application of this method, we take the reproductivity of waste oil drill pipe and the reproductivity evaluation of drilling pump crankshaft as an example. The test results indicate that our method can well evaluate the remanufactureability of the petroleum drilling and production equipment parts. As a whole，the proposed method is helpful to supplement the existing evaluation system. It is effective to guide the remanufacturability judgment of key parts of oil drilling and production equipment.

ATRFTIR was used to determine the content of dimethyl carbonate in gasoline. Quantitative analysis was performed based on LambertBill principle. The results show good linearity with the content of dimethyl carbonate in the range of 0.5%~10.0%,whereas the detection limit was 0.15% and the spiked recover rate were 101.4%~118.4% with the relative standard deviations less than 1%. The method proves to be simple, accurate, fast, reproducible and also costeffective.